MSA 2040 - VMWARE 6.7 - ReadCache

Hi There

Just in case anyone else has this trouble. I added a read-cache (SSD disk) to Pool A on my MSA 2040. Pool A held the datastore for my VMWARE 6.7 environment. Pool A had been up and running for months. I decided to add the read cache to improve read perfromance (as best practice suggests).

As a test I rebooted one of the esxi hosts after doing this. The datastore would no longer mount. The vmkernel log showed the error "Invalid physDiskBlockSize 512".

After much faffing about - I decided to remove the read-cache - the Datastore mounted correctly.